Re: [Xen-users] Error: Device 0 (vif) could not be connected. Hotplug scripts not working.

["Olivier B." <xen.list@xxxxxxxxx>]

Pasi Kärkkäinen a écrit :
> On Fri, Jan 29, 2010 at 03:31:10PM +0100, Olivier B. wrote:
>   
> > Hi,
> >
> > I tried to upgrade my dom0 kernel from 2.6.31.6-dae-dom0-00751-g60e0545  
> > to 2.6.31.6-dae-dom0-00757-ge65323d ; and domU doesn't start anymore.
> > I obtain this error message :
> >     
> > > root! noburo:/var/log/xen# time xm create /etc/xen/hel.cfg
> > > Using config file "/etc/xen/hel.cfg".
> > > Error: Device 0 (vif) could not be connected. Hotplug scripts not  
> > >       
> > working.
> >     
> > > real    1m41.491s
> > > user    0m0.116s
> > > sys    0m0.056s
> > >       
> > And the error is triggered after 100 seconds...
> >
> > I use Xen 3.4.2 (Debian amd64) in bridge mode, and a 2.6.31.12 vanilla  
> > pv_ops kernel.
> > In xen-hotplug.log I have only this line : Nothing to flush.
> >
> > And in xend.log I found that :
> > [2010-01-29 15:26:12 6213] DEBUG (DevController:139) Waiting for devices  
> > vif.
> > [2010-01-29 15:26:12 6213] DEBUG (DevController:144) Waiting for 0.
> > [2010-01-29 15:26:12 6213] DEBUG (DevController:629)  
> > hotplugStatusCallback /local/domain/0/backend/vif/5/0/hotplug-status.
> > [2010-01-29 15:27:52 6213] DEBUG (XendDomainInfo:2732)  
> > XendDomainInfo.destroy: domid=5
> >
> > Is there a bug in last pv_ops dom0 kernel, or have I something to fix in  
> > my setup ?
> >     
> Do you have netback driver/module loaded?
>
> Do you have udev installed? Start "udevmonitor" before you start the guest.. 
> do you see hotplug events?
> -- Pasi
>
>   
Sorry, I didn't your answer before... So if I start "udevadm monitor", I 
obtain :
udevmonitor will print the received events for:
UDEV the event which udev sends out after rule processing
UEVENT the kernel uevent

UEVENT[1266285891.062392] add      /devices/vbd-2-2048 (xen-backend)
UDEV  [1266285891.064356] add      /devices/vbd-2-2048 (xen-backend)
UEVENT[1266285891.097244] add      /devices/vif-2-0 (xen-backend)
UDEV  [1266285891.098725] add      /devices/vif-2-0 (xen-backend)
UEVENT[1266285891.116060] add      /devices/vif-2-0/net/vif2.0 (net)
UEVENT[1266285891.118280] online   /devices/vif-2-0 (xen-backend)
UDEV  [1266285891.125190] add      /devices/vif-2-0/net/vif2.0 (net)
UDEV  [1266285891.127347] online   /devices/vif-2-0 (xen-backend)
UEVENT[1266285891.288098] add      /devices/console-2-0 (xen-backend)
UDEV  [1266285891.289979] add      /devices/console-2-0 (xen-backend)
UEVENT[1266285891.347288] change   /devices/virtual/block/drbd2 (block)
UEVENT[1266285891.375061] add      /kernel/uids/65534 (uids)
UDEV  [1266285891.376787] add      /kernel/uids/65534 (uids)
UDEV  [1266285891.477763] change   /devices/virtual/block/drbd2 (block)
UEVENT[1266285892.496161] remove   /kernel/uids/65534 (uids)
UDEV  [1266285892.497624] remove   /kernel/uids/65534 (uids)

then some "noise" (I suppose) :
UEVENT[1266285915.289407] add      /kernel/uids/101 (uids)
UDEV  [1266285915.289918] add      /kernel/uids/101 (uids)
UEVENT[1266285916.320644] remove   /kernel/uids/101 (uids)
UDEV  [1266285916.322143] remove   /kernel/uids/101 (uids)
UEVENT[1266285975.204011] add      /kernel/uids/101 (uids)
UDEV  [1266285975.204632] add      /kernel/uids/101 (uids)
UEVENT[1266285976.236637] remove   /kernel/uids/101 (uids)
UDEV  [1266285976.238076] remove   /kernel/uids/101 (uids)

and after 100 seconds :
UEVENT[1266285991.909492] remove   /devices/console-2-0 (xen-backend)
UDEV  [1266285991.911456] remove   /devices/console-2-0 (xen-backend)
UEVENT[1266285991.945058] remove   /devices/vbd-2-2048 (xen-backend)
UDEV  [1266285991.946743] remove   /devices/vbd-2-2048 (xen-backend)
UEVENT[1266285991.948761] offline  /devices/vif-2-0 (xen-backend)
UDEV  [1266285991.950257] offline  /devices/vif-2-0 (xen-backend)
UEVENT[1266285991.976885] remove   /devices/vif-2-0/net/vif2.0 (net)
UEVENT[1266285991.989443] remove   /devices/vif-2-0 (xen-backend)
UEVENT[1266285992.076919] change   /devices/virtual/block/drbd2 (block)
UDEV  [1266285992.111812] change   /devices/virtual/block/drbd2 (block)

I also update my kernel to the 00776-gce7f50d version and have the same 
problem.
For the netback module, I have this entries in my dom0 .config file :
> CONFIG_XEN_NETDEV_BACKEND=y



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